Winneshiek County's estimated 2026 population is 19,793 with a growth rate of 0.3% in the past year according to the most recent United States census data. Winneshiek County is the 33rd largest county in Iowa. The 2010 population was 21,076 and has seen a growth of -6.09% since that time.
Data after 2023 is projected based on recent change
Overall: 42.6 years
Female: 43.5 years
Male: 41.8 years
There are 16,159 adults, (4,632 of whom are seniors) in Winneshiek County.
Female: 9,784 (49.2%)
Male: 10,089 (50.8%)
The racial composition of Winneshiek County includes 93.48% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 18,578 | 93.48% |
| Two or more races | 897 | 4.51% |
| Other race | 136 | 0.68% |
| Asian | 107 | 0.54% |
| Black or African American | 81 | 0.41% |
| Native American | 73 | 0.37% |
| Native Hawaiian or Pacific Islander | 1 | 0.01% |
Winneshiek County's average per capita income is $49,069. Household income levels show a median of $79,066. The poverty rate stands at 8.4%.
Name | Median | Mean |
|---|---|---|
| Married Families | $103,252 | - |
| Families | $100,599 | $125,096 |
| Households | $79,066 | $100,242 |
| Non Families | $44,984 | $56,861 |
Average Income
Median Household Income
Poverty Rate
